DISPERSON-STRENGTHENED VANADIUM ALLOYS
Bimonthly progress rept. no. 2, 14 Feb 13 Apr 1963
IIT RESEARCH INST CHICAGO IL
Pagination or Media Count:
Arc-melting and powder metallurgy techniques are used to incorporate fine, refractory dispersants in vanadium-columbium base alloys in order to improve their long-time, elevated-temperature strength properties. Solution annealing and aging studies of arc-melted alloys containing hafnium or zirconium in combination with carbon indicate that the hafnium carbide phase is more stable. The hydride process was used to obtain powders of V-60wo Cb-1wo Ti, to which fine oxide or carbide powders were added. After blending, cold- compacting, sintering at 2800 F, and annealing at 2000 and 2400 F, specimens containing alumina and thoria exhibited a high degree of reactivity with the alloy base. Improved stability was noted in the alloys containing ceria, lanthana, yttria, hafnium carbide, and zirconium carbide.
- Metallurgy and Metallography